Rubber boot jack.



J. H. MoKEGHNIE.

RUBBER BOOT 310K. 11.191 11101111011 FILED MAR. 30, 1911.

Patented Dec. 5, 1911.

H IH ITE STATE x'rnr ,rc.

JAMES HENRY IVIGKEGHNIE, OF MONTREAL, QUEBEC, CANADA.

RUBBER BOOT JACK.

Specification of Letters Patent.

Application filed March 30, 1911.

To all whom it may concern:

Beit known that I, JAMEs HENRY Mo- KEcHNIE, of the city of Montreal, inthe Province of Quebec, Canada, have invented certain new and usefulImprovements in Rubber Boot Jacks; and I do hereby declare that thefollowing is a full, clear, and exact description of the same.

This invention appertains to jacks adapted to support lasts used in themanufacture of rubbers and the like, or in analogous arts, in such amanner that the last when secured to the jack may be set to any angularposition and clamped in such position, and the object of this inventionis to improve the general construction of jacks of this sort and toprovide means whereby the last may be readily and securely connected tothe jack while being permitted greater freedom of movement thanheretofore. For full comprehension however of my invention referencemust be had to the accompanying drawings forming a part of thisspecification, in which similar reference characters indicate the sameparts and. wherein Figure l is a side elevation, partly broken away, ofmy improved jack; Fig. 2 is a view taken at right angles to Fig. 1; Fig.3 is a plan view with the last removed; and Fig. at is an enlargeddetail perspective view of the means for attaching the last to thecarrying member of the boot jack.

In the embodiment of my invention I prefer to form the jack so that itis adapted to be conveniently secured to a bench or the like used by theoperator.

Specifically speaking the jack consists of a block b pivotally supportedpreferably near the top by means of trunnions 0 held by standards 0secured to the bench (Z. The block Z) has a vertical hole a there-'through of inverted conical form while such block is normally held invertical position by means of a pair of displaceable pins 2. Within thehole 6 is loosely supported the lower tapered ends of a pair of clampingarms f which extend beyond both sides of the block, the upper ends ofthe arms being enlarged and formed with oppositely facing cup like eyes9 between which is loosely held a ball h which, being of greaterdiameter than the opening of either one of the eyes holds the latterapart and leaves a space therebetween which will be further alluded to.The taper of the arms 7 extends to the enlarged upper ends and is ofsufficient extent to prevent any possibility of the shoulders formed bysuch enlarged ends coming into contact with the top of the block and solimiting the clamping action of the arms. The ball 72. rigidly supportsthe last 2' in a mannerto be presently described, and is, through theloose connection therebetween and the eyes 9 and between the arms f andblock b, capable of universal movement, while the block Z), upon removalof the pins 2 and the drawing up of the arms f, to bring the lower endsthereof above the surfaces of the bench, the hinge connection of thetreadle allowing such movement, can be tilted upon the trunnions and sobring the last to a position upon the bench.

To readily attach the last i to the ball iz and securely fasten itthereto I provide a pair of pins j and 7a which are carried by the balland are adapted to enter corresponding holes in the last. The pin j isrigidly carried by the ball h and at a point beyond the eyes, is formedwith a shank Z at right angles thereto and preferably of square crosssection and upon which is slidably mounted the pin is by means of anintegral sleeve he formed correspondingly to the shank, the angular formof which prevents the sleeve from turning thereon and so causing the pin70 to fall out of position with its respective hole in the last. Byproviding one slidable pin I am enabled. to clamp both pins within theholes in the last by a nut n screw-threaded upon the outer end of theshank Z and bearing against one end of the sleeve at so that when thenut is screwed upon the shank the pins become tightly clamped againstthe adjacent walls of their respective holes in the last. I prefer toreduce in size the portion of the shank having the sleeve mountedthereon so that the exterior of the latter is flush with the mainportion of the shank and when the last is applied it will rest upon theshank and sleeve thus supplementing the pins 3' and 7c in preventing thelast from wabbling.

'As will be readily seen the beforementioned space between the eyes 9will provide an uninterrupted passage for the pin j and thus permit thelast to be turned, independently of the arms f, to a position inlinewith or beyond the horizontal center line of the ball, and to eitherside of the block Z) while the position of the last with relation to theblock 5 can be further varied by turning the arms f around in the holea.

The arms f are adapted to be forced toward one another and so clamp theball it between them and hold the last in any position to which it hasbeen adjusted and to accomplish this I connect the lower ends of thearms to a treadle 0, a hole p in the bench providing for this connectionwhich is effected by means of a wire 79 or the like, and a swivel g thelatter being provided to permit the arms to turn within the hole 6independently of the treadle while the hole 79 in the bench is elongatedto provide a clearance for thewire 29 attached to the arms f whentheblock b is tilted as before described. When the treadle is depressedthe arms d are drawn down within the hole 6, the convergence of whichacting in conjunction with the taper of the arms forces the lattertogether and causes the upper ends 9 to tightly clamp the ball betweenthem. The treadle may be retained in its lowered position by anypreferred device.

What I claim isas follows:

1. In a boot jack the combination with a t-iltable block having aconical hole tl1erethrough,-of a pair of arms within the conical hole, aball, having universal movement, supported between the said arms andadapted to support a last, and means for forcing the arms toward oneanother.

2. In a boot jack the combination with a block having a conical holetherethrough,- of a pair of tapered arms within the conical hole, a ballsupported between said arms and adapted to support a last, such lastbeing capable of turning, in opposite directions, to a position in linewith andbeyond the horizontal center line of the ball independently ofthe said arms, and means for forcing the arms toward one another.

3. In a boot jack the combination with a block having a conical holetherethrough, of a pair of arms within the conical hole and each havingone end of cup form, a ball loosely held between the said ends of thearms and adapted to support a last, such ball being of greater diameterthan the interior of either one of such cup like ends, which latterpresent anuninterrupted circumferential space therebetween and withrelation to the ball, and means for forcing the arms toward one another.

4:. In a boot jack, the combination with a block having a conical holetherethrough,- of a pair of tapered arms within the conical hole andpresenting at one of their ends a pair of oppositely facing cup shapedeyes; a; ball loosely held between. the eyes and adapted to support alast, and means for forcing the arms toward one another.

5. In a bootjack, the combinationrwith a block having a conical holetherethrough, of a pair of tapered arms extending through the hole andbeyondeither side of the block andpresenting at one of their ends a pairof oppositely facing cup like eyes; a ball looselyheld between the saideyes, of greater diameter thanthe opening of either one of the latterand adapted to support a last; and

means for forcing the arms toward one another.

6. In a boot jack, the combination with a pivotally supported blockhaving a conical hole therethrough;of a pair of tapered arms within theconical hole and presenting at one oftheir ends a pairof oppositelyfacing cup shaped eyes;'a ball loosely held between the eyes and adaptedto support a last; and means for forcing the arms toward one another.

7 In a boot jack, the combination with a block having a conical holetherethrough,- of a pair of arms within the conical hole; a ball looselyheld between such arms; means for securing a last to the ball includinga pair of pins, one carried rigidly and the other loosely by the balland both adapted to enter corresponding holes in the last; and means forforcing the arms toward one another.

8. In a boot jack, the combination with a block having a conical holetherethrough,- of a pair of tapered arms within the conical hole; a ballloosely held between the arms;

means for securing the last to the ball comprising a pair of pinscarried by'the ball and adapted to enter corresponding holes in thelast, one of such pins being rigidly secured to the ball and having'ashank formedtherewith, the other pin having a sleeve formed therewithadapted to be mounted upon the said shank and a nut bearing against thesleeve; and means for forcing the said arms toward one another.

9. In a boot jack, the combination with a block having a conical holetherethrough,- of a pair of arms within the conical hole and presentingat one of their ends a pair of oppositely facing cup like eyes; a ballloosely held between the eyes; a pinrigidly secured to the ball andhaving a shank formed therewith; a second pin having an integral sleeveadapted to be mounted upon the said shank and a nut screwed upon; theouter end of the latter; and means for forcing the arms toward oneanother.

10. The combination with a base or sup- I end presenting an upwardlyprojecting pin;

a movable member formed so as to be mount- In testimony whereof, I havesigned my ed upon the squared portion of the horizontal name to thisspecification, in the presence of section to slide thereon and be flushwith the two subscribing Witnesses.

main portion of the latter, such movable JAMES HENRY MOKECHNIE. memberhaving an upwardly projecting Witnesses:

member and a nut mounted upon the screw- C. H. ARRoWooD,

threaded portion of the fixed member. M. E. HALEY.

Gopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

